I would like to upgrade my main system to 16.04, but I work on projects that require OpenJDK 7.
Apparently it is not available from a trivial
apt-get install openjdk-7-jdk. Only versions 8 and 9 are listed in the repository.
Can anyone point me to instructions on how to install it?
sudo add-apt-repository ppa:openjdk-r/ppa sudo apt-get update sudo apt-get install openjdk-7-jdk